Shortly after the game, a crowd gathered in Seattle's Pioneer Square, a neighborhood marked by a number of historic buildings. David Ryder/Getty Images More than 3,000 Seattleites joined the celebration of chanting and dancing fans. Fans took over intersections and smashed champagne bottles on the pavement. REUTERS/Jason Redmond Before long, fans started lighting small bonfires and fireworks. Some fans even began bringing out furniture and lighting it on fire. REUTERS/Jason Redmond The crowd started to get really boisterous, breaking glass on top of this pergola. REUTERS/Jason Redmond Riot police were summoned to keep control of the crowd. Some fights broke out and police began arresting unruly fans. REUTERS/Jason Redmond One police officer was assaulted by a fan. David Ryder/Getty Images Another man was arrested for firing a weapon in celebration in the city. REUTERS/Jason Redmond Police began extinguishing fires and dispersing the crowd. It didn't take long for the crowd to go home once the riot police got involved. REUTERS/Jason Redmond